You can measure angles on the field with this, and measure those same angles back at your desk with a protractor. 你可以用这些工具在野外测量角度，也可以用一个测角器在你的桌子上测量这些同样的角度。
This design implements a stable and efficient digital tracking angle measuring system with fine augmentability. 本设计实现了一种稳定高效的跟踪式数字测角系统，具有很好的扩展性。
